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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7aa305a0cefd2ff463d49bbe6ca69bc691dcf76a68aa9f49506ec8e390741960' 
  AND token = 'Mfs/BzxOAscUEauzkM8+iHplRoigeKeXN4eTatQ/4K0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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