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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd95859ba09098364fbdaedb852eaf2edefb14225e17d63c7e3894a62930d7e2b' 
  AND token = 'SOqEX/2NdS0EE+B5u7u9R+GWczO8m9RYp14nmrFe+nM=' 
  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"
    }
  }
}