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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11ce92acbf136713db5d7b84eb2b8cf7783862c2e77dc4fcf06fc58414d0ef3f' 
  AND token = 'HdbIJO0GUsmSLW2ueu0GydtZ52OHD5dIld98Cyb/P6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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