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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07c40dd9301d8ab2a196a9390061f87be9f480a7c4e0658a733b8a023cc01097' 
  AND token = 'Z/BngRoF0iCNUx/jVvsrjQbF28iHfaVxB8MxulSJp20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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