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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9414a334fc3707f555fb05b59dc08209fcfa9eb279693d810af3756a85e45be' 
  AND token = 'deDdBtyQcSEsHHxBW/GorAwuMmGI8gwp/qt9L9uCE9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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