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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f09fe6eb6edbe1acdc0f66714413b14697ada0bbbbb05c737d32c4fb805314d' 
  AND token = 'faHHc4pFcsaiuO2iytUn3sUHxbSogrPsLBOAH4hgJB4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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