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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd5909c066d3fc2add9880df2a533fe2ad51e703816dd6d1f6559e623ae2d5fbe' 
  AND token = 'Cy6Gd0TzwLW9g94IOqGorwdaNAgy7TVKcjrMN2hakIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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