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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cc652439b51e340e1ceb9e268cec67a40f4cc28e64b79a7cbf9bebf357965a0' 
  AND token = 'Y70/vF1H58ckqomtIrfqkQLzPO2FfhlgjxpDSejoKHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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