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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07fca5867957d7052ebef73dbd824a0d66f4ebaad636dce65cc6f44e1a30e05e' 
  AND token = 'N1t+kb18xAKOf0sGftdUUkH6LpU8NuCBFumvYUogkSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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