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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '360eb77846ebb2945093d3efbc216fdb072c59c0fbc5a14b03f6ebecd5e64b83' 
  AND token = 'Ph9i2zW0/g57xnVKnccTy/xKKgW2YY9AlmV0Wt2ddKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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