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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '028d2e94eca8cf8b1fa28d94568838aa2f86e3b162062055605a504a8d092205' 
  AND token = 'kk3hq+svn0K+4LK1iQgZXaFaC5u+oI15Gca21nkIIqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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