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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a661fec8e3dae5fce98716cacdf481185ee6a8b9078d87fb116aa5116d9fce6' 
  AND token = 'HVJshbj3a1L/fp2VxFWRMZwHVVRGkEZIW+W6ld6QWBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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