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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65c5e64f17018d1cd83d4886ec20de9f5efc5ec3cf3cdb310cbce043b32e5153' 
  AND token = 'oiY7354x4YS5sSSKkcFzGo1KGJdQj7XlsIx1irHp2So=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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