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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eadb199f255718ef1f4a8ee7d63586159ca95f6ab72ebe095ac3e3809e85e4bf' 
  AND token = 'jjjKbBU7lBddT5/pDObIwWo2qn8A44gWNfwDY3tAjJc=' 
  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"
    }
  }
}