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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbd810a66ec82cf230ebbfbcc798bac2e3955db9c5f9c18d079bd6ef29cc57f2' 
  AND token = '+TfI61qtu+nE2l2Ljs9mQFqdjqOrUSEvrN/8/jVivOk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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