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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05e8826ed8e7f7d4234d0a9f7fe8ccdd8d01d0c7d5cabca83739f83801f9dc6a' 
  AND token = 'azy05s8CEq8nc1+PtLsxwjoq+8Si7sav8E8zzn25ANA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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