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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c0acfdc2ebc932f79e76653bf8d7ec0059c28cd11a5df1df52deef959e4732d' 
  AND token = 'afwnAI//3Dz6Ury50a8vn2YYZFkeX2kZ1tqbw77lAIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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