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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'addefea5b4b8ff85905e8825bfc25b072e269b7e957a6a37e7cb95ad6dd0c1db' 
  AND token = 'ihyXvf0eSyIDQOZldp2lKOFSwelOp0Y7beIwkMjFbHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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