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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c095605a2445ef86e76dcdc4a77fd70137596e876cff566aa1eb3236d2e9d1e6' 
  AND token = 'kcMW9PGPomKL+W/mx6ZktAg55o+VklOCSb4UaXv6OA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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