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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '90ead5105ac39c87eb9b710a7edd76d620ced92a0e24ffca86da3879811a54b7' 
  AND token = 'Z6XLpiW+3YqI8yuWWfNc1E+V3GyQukz0eRLQg2bEFDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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