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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28df134cc7eae98b9e9b62bcbe7235a14559e2548b9ef7f87ec91543e9a351b0' 
  AND token = 'x6Cryl5mlld/iUGzG3yBJwmSkS5B9diSlTNGJiBSxNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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