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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '167e20db2b44a6c82bdddab20f2c5f8beb4a7b6659dbb5b223ca455209ec1ef5' 
  AND token = '/JPFa2VMmY1TY+UIVEptV8UkRRX2TjiEIDY7H/KRtAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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