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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c450fa6224aeaacd070d171d61b218dcca41b767c5ff6b1ebfbbf088e232e23' 
  AND token = 'oituf2MxQp1/U1ouUmGk5I2k0EJd7GPuyj3dKJyQlic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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