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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65c74a73fa9d696d3d6a725fa899a23bf35b5f776065cfa64f628a97bccb4760' 
  AND token = 'LyaEu4EcBTsz7X8Tz2mVu55nvZvKwsWzNeH8sn5ALUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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