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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e454f4847018a3dfe3a2ba5fdedae444e6d5f1598585c24fd37a7c8a16a59ee8' 
  AND token = '5d3q2fQLJihDsC8Gl1AFSi1L3UccEBPK1NvasnRLwaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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