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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '705a16dc6a558c2dfe2e4996ad21b61f9e6e357bd0909e39a1c4ba1225ec61fe' 
  AND token = 'IFfontmm7wr+AfHyfe3YNEpURlv+F+2Tx9am6wQDIoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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