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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e9454ea609dd633c6ac0aa89bb20a641f4e1e445aa29dc257e85d7b3a13adb1' 
  AND token = 'f6YaccHAFf/TFeMGR5iBQ3mprq8DeiI1awtcBMBaIJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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