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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '05d118a4bc0f7b90286f8b2e529160e40bef3a8b2c26faaba4b886635b85bd86' 
  AND token = 'VXqTWjs9o2g/BeiidCEL8wd87zxwVouO7IK5UuABkAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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