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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b2cdd921421d1168f189b3f95f1a9fffc68368bdf742adf200b10eddc057dde' 
  AND token = '1ahllkEWQjVBLG7UT3pb4PWSMhiNU2iTnxrHth6cmGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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