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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb88d7fbdfc24ec897661625161a84c7d6ca1030c939c14092b9862364a52e0f' 
  AND token = 'DFaLYY/cX8yMlwjOHlYapjbH+7Q5skSqC/1C5In1UDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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