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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00622d979511cbc9d7c28008f6053e99d2fd7a3bfd657fa111d69ef15d9dbe62' 
  AND token = 'Vox41OFTLRfPms07LVMGL7SyhacV3lRQ0MRoVO90jRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}