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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d074ca1e3da5a36d23c3cafa61cf7ea5784ce0e2223de4772ef8afa50a78d02' 
  AND token = '1bKOc3S+ccvVMZRC7IuX+0yKoL3ooNOLz2vIscghKrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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