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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'afc59a42347b13ec00847de3a9f4caa26eba33dfbe9f0ae66feea334c586d2d7' 
  AND token = '2t6hwRaSyQliKzza40e9cvWT1Wfl9RPu4UAcPeOppyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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