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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b01b79de089282e5d7ae79fb7980e7a6b1d63529e13fac7eac211113fb996e2e' 
  AND token = 'JBlbKIIMiaqO0jD40vLVjHBPmUA6y9HkH12+YVNbH0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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