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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'baea1f5c44c6d735ead8a165dc70df4d15b30baf2aca9d48fd6e407ec14d48c7' 
  AND token = 'T9ZVE1k6Xb2lsYrG8di3rhx9R1BQfLdRlxDYWI0ar6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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