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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '407a08ac84872eb23dac9c65ca5dcbe3d06953cad3ca1dbeed5f52d5b8466632' 
  AND token = 'j4D1flufe+S3R6uejmdTB/SjNFFptj37K+aTxIm6O4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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