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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca6a153fcb2f59bc636488037a79c89d8cc0132381201cd4076db0043511e46b' 
  AND token = 'YoT+S+vvNLq/EAXuKeTUT11LDzHyRn/pE515ckkcMaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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