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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0bc016d791955217e5e2f6848ff25532b6dc132c267e84d133d7b52572cd3aa3' 
  AND token = 'zXVHq6k1PiMnH3dOH/2FBnn5z58AC8DNMtb2WhNu4Mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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