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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba4d3c59bd60fbfbd1a4c7314841076883261ae0fc7f1ca66483ab1f83a851d8' 
  AND token = 'n5Y2sZ1GnrBNFFotOPJuU36CgaY4vX4VJ4L25nNC1zI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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