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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5344a9e77622e24c8d09cee7c78c78223e98aac6ea0940c1214c8f75774b0ade' 
  AND token = 'abW3ew8a0/GotVQkzNgsw3K4EYp5FsVyJJ6ze0TodKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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