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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0731bb6c8314e7cf09fd46824c57beb6d6a9418ff90cf2fcea2a3f11f74edd1' 
  AND token = 'Gyc5oro3jogKlu6qImGLoPUaEmzJaMSPm/BSX8APRKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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