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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d3e1aa679ae6c0a0ccd1d5245ac6c89d578c20ccdf7ac3eb83511145f5d37d3' 
  AND token = '59WL7yrx42mdkhsCCrO/3t3zOWCfHVMAO06Is1NGyUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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