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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '074c13a8383baf7d22783e2e19ae52318a1d4117bd02ea188ddc66b3401379e2' 
  AND token = 'eNZaAfIfuyA56CZYK53HSTnxYvVdj/a6GhJX53EnKgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}