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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62a4c19e14fcf5d4d2af232b226b0c8703a1dd1410ef58793039249abdfe27be' 
  AND token = 'kzXANkjMtsKYCxedfJVq4Ufp+56KWDe/ULlZuyCIf0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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