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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60c3b1a05934883bc106d6bfdc7e0551416705f62ceef235bf242405260e2de7' 
  AND token = '/QrhgL+whepnQ8L/bmSZyqcsdOCCefAQ1Nqw55W/Oos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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