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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '719fa41791ebbaa7f81817866f33d601d470f0d8b8ecc07466b5d76b07b9abff' 
  AND token = 'vxbdLqY0CYqJoKrAHtOakKrimImAtyXMtHlkf2+o/XA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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