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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fdf71146a5011c63395afa8fa03a505300b7267c5b76d78e11e37e8c66166063' 
  AND token = 'Kk/AJ01n/Zk0Toa+GkezLw4Y0vH13et7USCFq9zs4Qw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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