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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f16f7acfc34b5e631b9b1f5877cf7302871b31d1bec9812166c32b4a1daa258d' 
  AND token = 'uWIko6KodQiDXAfWrr9HA5kNCEuUH7xRh8IXgcp26fU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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