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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c3f50c728ba31b088a3dfddeac6f5c10c3d5f13f1b6103a1eec20a1c411f003' 
  AND token = 'cN0ao8K8StM+bzb9yTIulN7iBxGuNVBVp/9QZo/LBDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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