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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eba817b193d51de37a5cdfd3471ba6dbd6428ae7986465d0b30313ce577b6cb1' 
  AND token = '7zsVxTu60Uzuoahqct5julZF6xqoRSPqkfKTdYd6t/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00120

JSON explain

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