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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '477972cb21c14c3c27415f351a631ed71017f296d27f2cf8cec6de3d19dd1452' 
  AND token = 'EiHdMls2oH07r4AVpVNwQABogEMJl3WbO17goqLbZtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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