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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba490bd077d3ed840c2ec70a78faa2c020dfbb164569adf3c9b7ee7ec0369ea6' 
  AND token = 'xfVxOaanm73xmL0rLPAn/+Q++lnpCYNtPUPifkVDi/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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