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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1e6d418db95eadc7996d1e832e8e6c028f3be48217eeb165eb2a348c04bbfec0' 
  AND token = 'TXQXEsFSpfE8coXv6Z+clRd+KqFUDJu4WK9otiByp2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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