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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed45c96010c41d072333fb2c2f4b16cb6727fbd130583b2f9e93651c137cb89a' 
  AND token = 'Px551uftuujhRGH9ZNlr3FnKoCLIfeUrnJs7m1PA8qQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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